The most easy and complet programmable RPN calculator in Internet. Compare it with any other you can find! It will accept arithmetic expressions or functions: for example to compute the expression (1+a^2)*((a-1)/(a+1) you have to insert (or paste from clipboard) the expression as it's written, insert a value for a and press 'enter'. Graph plotting of a function - Computing of integrals and derivates - Computing of a function (linear, logarithmic or exponential), that better describes a series of values - Solution of f(x) in an interval.Vectors (three dimensions) calculator (RPN)- Matrix computing (only for 32 bit version)- Solution of systems of three equations - Possibility of operating as a normal calculator (RPN):Mathematic - etc. - etc.